Android Open Source - Station42 Bullet Collision System

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License

The source code is released under:

Apache License Version 2.0, January 2004 http://www.apache.org/licenses/ TERMS AND CONDITIONS FOR USE, REPRODUC...

Java Source Code

package com.station42.bullet;
//from  w ww . jav a  2 s  .  c om
import com.station42.base.Engine;
import com.station42.base.EngineUpdateListener;
import com.station42.base.Entity;
import com.station42.basic.EntityLocation;
import com.station42.death.BulletDamageMessage;
import com.station42.world.Wall;
import com.station42.world.World;

public class BulletCollisionSystem implements EngineUpdateListener {
  
  @Override
  public void update(Engine engine, float delta) {
    for (Entity bulletEntity : engine.getEntitiesWithComponent(Bullet.class)) {
      Bullet bullet = bulletEntity.getComponent(Bullet.class);
      Entity nearestTarget = null;
      float nearestTimeDistance = delta + 1;
      for (Entity target : engine.getEntitiesWithComponent(EntityLocation.class)) {
        if (!bullet.isShooter(target) && World.visible(bulletEntity, target)) {
          EntityLocation location = target.getComponent(EntityLocation.class);
          float distance = bullet.intersectDurationCircle(location.getCenter(), location.getRadius());
          if (distance != -1 && distance <= delta && distance < nearestTimeDistance) {
            nearestTimeDistance = distance;
            nearestTarget = target;
          }
        }
      }
      for (Entity target : engine.getEntitiesWithComponent(Wall.class)) {
        if (!bullet.isShooter(target) && World.visible(bulletEntity, target)) {
          Wall barrier = target.getComponent(Wall.class);
          float distance = bullet.intersectDurationLine(barrier.start, barrier.end);
          if (distance != -1 && distance <= delta && distance < nearestTimeDistance) {
            nearestTimeDistance = distance;
            nearestTarget = target;
          }
        }
      }
      if (nearestTarget != null) {
//        System.out.println(nearestTarget.name + " HIT!");
        engine.despawnEntity(bulletEntity);
        engine.handleMessage(new BulletDamageMessage(bullet.getShooter(), nearestTarget, null));
      }
    }
  }

}

Java Source Code List

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